Quarter	Billions of US Dollars
1987-04-01	-0.09134
1987-07-01	-0.14262
1987-10-01	-0.22860
1988-01-01	-0.15450
1988-04-01	0.00587
1988-07-01	0.05923
1988-10-01	-0.00112
1989-01-01	-0.03273
1989-04-01	-0.10837
1989-07-01	-0.02750
1990-01-01	-0.02525
1990-07-01	-0.08000
1990-10-01	-0.17500
1992-01-01	0.12390
1992-07-01	-0.18669
1993-04-01	-0.50000
1993-07-01	-0.08941
1994-04-01	-0.09027
1994-07-01	0.01000
1994-10-01	0.01000
1995-04-01	-0.16197
1995-07-01	-0.10047
1995-10-01	-0.08936
1996-01-01	0.00800
1996-04-01	-0.01000
1996-07-01	0.00800
1996-10-01	-0.00490
1997-01-01	-0.00900
1997-04-01	0.05458
1997-07-01	0.05870
1997-10-01	0.20186
1998-01-01	0.09389
1998-04-01	0.00126
1998-07-01	-0.01892
1998-10-01	0.20647
1999-01-01	0.15117
1999-04-01	0.00120
1999-07-01	0.06924
1999-10-01	-0.00373
2000-01-01	0.00269
2000-04-01	0.04747
2000-07-01	-0.00132
2000-10-01	0.00140
2001-01-01	-0.00056
2001-04-01	0.09916
2001-07-01	0.00115
2001-10-01	0.12097
2002-01-01	0.45088
2002-04-01	0.00100
2002-07-01	0.23104
2002-10-01	0.15114
2003-01-01	0.05138
2003-04-01	0.03654
2003-07-01	-0.05960
2003-10-01	0.17900
2004-01-01	0.92940
2004-04-01	0.31005
2004-07-01	0.27659
2004-10-01	0.12467
2005-01-01	0.84828
2005-04-01	1.10067
2005-07-01	1.53334
2005-10-01	3.67847
2006-01-01	1.34822
2006-04-01	3.31953
2006-07-01	1.55307
2006-10-01	5.60940
2007-01-01	5.65289
2007-04-01	1.40961
2007-07-01	0.11666
2007-10-01	-0.49689
2008-01-01	2.77463
2008-04-01	0.87632
2008-07-01	0.29100
2008-10-01	-3.84637
2009-01-01	-2.07204
2009-04-01	-0.43550
2009-07-01	1.32938
2009-10-01	1.50715
2010-01-01	0.01087
2010-04-01	-1.33331
2010-07-01	-0.08017
2010-10-01	-1.93920
2011-01-01	1.77696
2011-04-01	-1.38009
2011-07-01	1.02316
2011-10-01	-0.04935
2012-01-01	3.00105
2012-04-01	0.99523
2012-07-01	2.46801
2012-10-01	9.39133
2013-01-01	4.09018
2013-04-01	6.79059
2013-07-01	0.94238
2013-10-01	3.70843
2014-01-01	0.64441
2014-04-01	6.57523
2014-07-01	1.84646
2014-10-01	0.55329
2015-01-01	3.81837
2015-04-01	6.43001